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P0491 Diagnostic Trouble Code Discussion for March 2007

Secondary AIR System Insufficient Flow Detected (Bank 1)


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Trouble Ticket Help Requests for DTC P0491
Help Request Posted
2001 BMW 330i 3.0L Misfire, MIL Lamp on VIN: WBAAV53471
P0491: Auxiliary Bank1. ... my own Vehicles, This problem comes and goes. Service engine soon light comes on and sets codes P0491&P0492, Already replaced Both 02 sensors before catalityc comberter. Problem still exist. Light set on and off by Its...
March 05, 2007
2001 BMW 330i 3.0L Misfire, MIL Lamp on VIN: WBAAV53471
P0491: Auxiliary Bank1. ... my own Vehicles, This problem comes and goes. Service engine soon light comes on and sets codes P0491&P0492, Already replaced Both 02 sensors before catalityc comberter. Problem still exist. Light set on and off by Its...
March 05, 2007